Posts (page 91)
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7 min readIn Ember.js, you can obtain an instance of a controller by using the "get" method, which retrieves a property's value from an object. Here is an example of how to get an instance of a controller:In a route handler function or a component's JavaScript file, such as a controller or a template's associated JavaScript file, you can use the "get" method to retrieve an instance of a controller.
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4 min readIn D3.js, you can select the last child element using the ":last-child" selector. This selector targets the last child element of its parent.To select the last child using D3.js, you can use the ".select()" function followed by the ":last-child" selector. Here's an example: d3.select("parentElementSelector") .select(":last-child") .
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4 min readIn Ember.js, there are different ways to handle events depending on the context and requirements of your application. The most common and recommended approach to handle events is by using the built-in Ember event system.Ember provides a convenient way to bind to DOM events using the {{action}} helper. This helper is typically used to bind events to user interactions, such as button clicks or form submissions.
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7 min readDuplicate values in d3.js can sometimes cause issues when working with data visualization or manipulating elements on a webpage. Here are a few techniques to handle duplicate values in d3.js:Remove duplicates: One simple approach is to remove all duplicate values from the dataset before processing it with d3.js. This can be achieved using JavaScript's Set object or by leveraging the d3.set() function.
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7 min readIn Ember.js, converting a nested model into JSON involves using the serialize method provided by Ember Data. This method allows you to transform a model or a collection of models into JSON format.To convert a nested model into JSON in Ember.js, you can follow these steps:First, make sure you have defined your models and relationships properly.
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5 min readTo make an image round in d3.js, you can follow these steps:Select the image element you want to make round using d3.select() method. For example, if you have an image with a class name "image-class", you can select it using d3.select(".image-class"). Add a "clip-path" attribute to the selected image element. This attribute will define the clipping path for the image. Set the value of "clip-path" attribute as "url(#clip-circle)".
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5 min readEmber.js supports a wide range of events that developers can utilize to build interactive web applications. These events include:Click: This event occurs when a user clicks on an element.Double click: It is triggered when a user quickly clicks twice on an element.Mouse enter: This event is fired when the mouse pointer enters the boundaries of an element.Mouse leave: It is triggered when the mouse pointer exits the boundaries of an element.
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6 min readTo load a text file into d3.js, you can follow the steps outlined below:Create an HTML file and add the necessary script tags to include the d3.js library. Make sure to also create a element with an appropriate ID where you want to display the data. Inside the script tag, use the d3.text() function to load the text file. Pass the path to the text file as an argument. d3.text("data.txt") .
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8 min readTo unit test an Ember Router, you can follow these steps:Import the necessary modules in your test file: Typically, you will need to import moduleFor and test functions from the Ember QUnit module. Use the moduleFor function to define a test module, providing a name for the module and specifying the type of Ember object you are testing. In this case, it will be the Router. Define a test function using the test function.
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4 min readThe purpose of ember.deferred in the Ember.js framework is to provide a mechanism for handling asynchronous operations and managing their results. It allows developers to create deferred objects that represent the outcome of an asynchronous task such as making AJAX requests, loading data from a server, or performing any other non-blocking operation.The deferred object acts as a placeholder for the eventual result of the operation. It can be in one of three states: pending, resolved, or rejected.
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11 min readEmber.js is a JavaScript framework designed for building ambitious web applications. When structuring an Ember.js web application, it is essential to follow certain conventions and best practices to ensure maintainability, scalability, and modularity of the codebase.File Structure: Ember.js follows a conventional file structure known as the "Pods" structure.
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6 min readTo create a login form using Ember.js, follow these steps:Start by setting up a new Ember.js project or navigating to an existing one. Create a new route for the login page. In your project's app/router.js file, add a new route for the login page using the this.route() function. For example: this.route('login'); Generate a new template for the login page.